CN107487911B - Plasticizer DINCH wastewater pretreatment method - Google Patents
Plasticizer DINCH wastewater pretreatment method Download PDFInfo
- Publication number
- CN107487911B CN107487911B CN201610409130.XA CN201610409130A CN107487911B CN 107487911 B CN107487911 B CN 107487911B CN 201610409130 A CN201610409130 A CN 201610409130A CN 107487911 B CN107487911 B CN 107487911B
- Authority
- CN
- China
- Prior art keywords
- wastewater
- fenton
- plasticizer
- dinch
- microwave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 113
- 239000004014 plasticizer Substances 0.000 title claims abstract description 32
- HORIEOQXBKUKGQ-UHFFFAOYSA-N bis(7-methyloctyl) cyclohexane-1,2-dicarboxylate Chemical compound CC(C)CCCCCCOC(=O)C1CCCCC1C(=O)OCCCCCCC(C)C HORIEOQXBKUKGQ-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000004806 diisononylester Substances 0.000 title claims abstract description 27
- 238000002203 pretreatment Methods 0.000 title claims description 3
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000012028 Fenton's reagent Substances 0.000 claims abstract description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000005855 radiation Effects 0.000 claims abstract description 20
- 230000009471 action Effects 0.000 claims abstract description 14
- 239000007800 oxidant agent Substances 0.000 claims abstract description 12
- 230000001590 oxidative effect Effects 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 5
- 230000006698 induction Effects 0.000 claims abstract description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 23
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical group [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 16
- 239000011790 ferrous sulphate Substances 0.000 claims description 15
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 15
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 11
- 230000001089 mineralizing effect Effects 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 5
- 238000006386 neutralization reaction Methods 0.000 claims description 4
- IYVLHQRADFNKAU-UHFFFAOYSA-N oxygen(2-);titanium(4+);hydrate Chemical compound O.[O-2].[O-2].[Ti+4] IYVLHQRADFNKAU-UHFFFAOYSA-N 0.000 claims description 4
- MGZTXXNFBIUONY-UHFFFAOYSA-N hydrogen peroxide;iron(2+);sulfuric acid Chemical compound [Fe+2].OO.OS(O)(=O)=O MGZTXXNFBIUONY-UHFFFAOYSA-N 0.000 claims 3
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 238000006555 catalytic reaction Methods 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 26
- 238000005516 engineering process Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000593 degrading effect Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- QSAWQNUELGIYBC-UHFFFAOYSA-N cyclohexane-1,2-dicarboxylic acid Chemical compound OC(=O)C1CCCCC1C(O)=O QSAWQNUELGIYBC-UHFFFAOYSA-N 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- QDTDKYHPHANITQ-UHFFFAOYSA-N 7-methyloctan-1-ol Chemical compound CC(C)CCCCCCO QDTDKYHPHANITQ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004439 Isononyl alcohol Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960004365 benzoic acid Drugs 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- PKVQSSWKJIPMRR-UHFFFAOYSA-L disodium;cyclohexane-1,2-dicarboxylate Chemical compound [Na+].[Na+].[O-]C(=O)C1CCCCC1C([O-])=O PKVQSSWKJIPMRR-UHFFFAOYSA-L 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010812 mixed waste Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/302—Treatment of water, waste water, or sewage by irradiation with microwaves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention relates to a method for treating plasticizer DINCH wastewater by a high-efficiency microwave-Fenton oxidation method, which comprises the following steps of 1) adjusting the pH value of the wastewater to 3 by using a dilute sulfuric acid solution; 2) adding a Fenton reagent under the action of microwave induction, and adjusting the pH value of the wastewater to 7-8; 3) after microwave radiation, the wastewater enters an ultraviolet light catalytic reaction zone, and hydroxyl radicals are generated by utilizing the combined action of ultraviolet radiation, a catalyst and an oxidant, so that organic matters which are difficult to degrade in the wastewater are further decomposed and mineralized. The method has the advantages of stable and reliable treatment effect, simple and easy operation and lower operation cost, and is suitable for pretreatment of high-concentration organic wastewater discharged by organic chemical enterprises and plasticizer production enterprises.
Description
Technical Field
The invention relates to the technical field of wastewater treatment of organic chemical industry, plasticizers and the like, and discloses a novel method for treating high-concentration organic wastewater.
Background
Cyclohexane-1, 2-dicarboxylic acid diisononyl ester (abbreviation: DINCH) is a novel safe and environment-friendly plasticizer, and is mainly used for: medical drugs, food packaging, children's toys and children's care products are good substitutes for benzene carboxylic acid ester plasticizers. Industrially, the synthesis method of the plasticizer DINCH is esterification synthesis under the action of catalyst tetraisopropyl titanate.
In the DINCH esterification process of the plasticizer, the production wastewater mainly comes from the working procedures of neutralization and water washing, the crude ester is neutralized with NaOH solution, the monoester acid in the crude ester is neutralized into sodium monoester by alkali, and the catalyst is hydrolyzed into TiO2The oil phase is washed with water to produce water-washed wastewater. The two parts of waste water of the neutralization process and the water washing process are organic waste water, have complex components and mainly contain hexahydrophthalic acid, hexahydrophthalic monoester and hexahydrophthalic acid diesterFormic acid diester, sodium hexahydrophthalate, isononyl alcohol and TiO2A hydrate of (1). The biodegradability of the wastewater is detected, and the test result shows that the CODcr value of the neutralized wastewater is 52118 mg/L, BOD5The ratio of COD is less than 0.3, and the biochemical treatment is difficult; CODcr value of water washing waste water 4532 mg/L, BOD5The ratio of COD to COD is more than 0.3, and the method is suitable for biochemical treatment; mixing the two waste waters, and obtaining the CODcr value of 47200mg/L, BOD5The ratio/COD is still less than 0.3.
TABLE 1 summary of wastewater analysis data
| Analysis item | COD(mg/L) | BOD5(mg/L) | BOD5/COD | Biochemical performance |
| Neutralizing the waste water | 52118 | 10356 | 0.2 | Difficult to be processed |
| Washing wastewater | 4532 | 1701 | 0.37 | Is suitable for biochemical treatment |
| Mixed waste water | 47200 | 11328 | 0.24 | Difficult to be processed |
Aiming at the characteristics of high organic matter content and poor biodegradability of the wastewater, the wastewater can be pretreated firstly, on one hand, partial COD is removed, on the other hand, the B/C value is improved, and preparation is made for the next biochemical treatment.
The Fenton reagent method is a homogeneous catalytic oxidation method which adopts hydrogen peroxide as an oxidant and ferrous salt as a catalyst, wherein HO-free radicals generated in the reaction are free radicals with strong oxidation capacity under an acidic condition, have higher oxidation-reduction potential, can quickly oxidize pollutants in the wastewater without selectivity, can crack carbon chains of organic structures in the wastewater, and crack macromolecular organic matters which are difficult to biodegrade into CO2And H2And O. Compared with other oxidation processes, the Fenton reagent oxidation method has the characteristics of low operation cost, simple process, simple and convenient operation and reaction at normal temperature and normal pressure.
The microwave is an electromagnetic wave having a wavelength of 0.001 to 1m and a frequency of 300 to 300000 MHz. It has strong penetrating action, can directly heat reactant molecules, reduce the activation energy of reaction and the chemical bond strength of molecules, and greatly improve the reaction activity. The research of treating organic wastewater by using a microwave-promoted Fenton reagent method shows that the reaction rate and the removal rate of organic matters degraded by the Fenton reagent can be improved by microwave radiation, and the reaction activation energy can be reduced. The microwave is introduced into the Fenton reaction, and the method has obvious significance for treating the wastewater by utilizing the Fenton reaction advanced oxidation technology and improving the treatment efficiency.
Catalysis by ultraviolet light, i.e. by ultraviolet radiation and TiO2The combined action of the hydrate and the Fenton reagent oxidant generates hydroxyl free radicals, and further makes wastewater difficult to be treatedThe degraded organic matter is decomposed and mineralized. In the absence of UV irradiation, Fe2+The cyclic regeneration rate of (2) is slow. Ultraviolet light and Fe2+Has synergistic effect on catalytic decomposition of hydrogen peroxide, can increase the generation rate and concentration of OH-free radicals in the system, and assists Fe in Fenton reaction by ultraviolet light2+The main pathway for regeneration is Fe2+-photochemical reduction of the complex. The ultraviolet light is beneficial to the Fenton reaction, and can enhance the oxidative degradation of organic matters by the Fenton reagent, thereby degrading the organic matters in the wastewater more thoroughly.
Disclosure of Invention
In order to solve the problem that the plasticizer DINCH is difficult to neutralize wastewater and carry out biochemical treatment, the invention aims to develop a novel efficient technology for degrading the plasticizer DINCH wastewater by combining a microwave-ultraviolet-Fenton reagent, so as to reduce CODcr of the wastewater, improve the biochemical performance of the wastewater, reduce the wastewater treatment cost and improve the benefit.
The invention adopts a technology of degrading plasticizer DINCH wastewater by adopting a high-efficiency microwave-ultraviolet radiation-Fenton reagent combined oxidation method, and is characterized by comprising the following steps: (1) adding dilute sulfuric acid into the wastewater generated in the neutralization process of a plasticizer DINCH, and adjusting the initial pH value of the wastewater to 3; (2) adding a Fenton reagent into the wastewater under the microwave induction effect, adjusting the pH value of the wastewater to 7-8, decomposing and mineralizing organic matters difficult to degrade in the wastewater, generating hydroxyl free radicals under the combined action of ultraviolet irradiation, titanium dioxide hydrate and a Fenton oxidant, and further decomposing and mineralizing the organic matters difficult to degrade in the wastewater, wherein the ultraviolet dose is more than 1000 mJ per square centimeter.
The invention preferably (1) uses dilute sulfuric acid solution to adjust the pH value of the waste water to 3; (2) under the microwave induction action, adding ferrous sulfate and 30% by mass of a hydrogen peroxide solution, wherein the microwave power is 600-800W, the microwave radiation time is 5-10 min, adjusting the pH of the wastewater to 7-8, the mass ratio of the hydrogen peroxide solution to the ferrous sulfate is 2-30: 1, and the dosage range of a Fenton reagent is 1.0-10 ml/m3The retention time is 1-4 h; (3) under the combined action of ultraviolet irradiation, titanium dioxide hydrate and Fenton oxidant, hydroxyl free radicals are generated, and thenDecomposing and mineralizing refractory organic matters in the wastewater, wherein the dosage of ultraviolet rays is more than 1000 mJoule per square centimeter; (4) the removal rate of COD in the wastewater reaches more than 98 percent.
The technology for degrading plasticizer DINCH wastewater by combining the efficient microwave-ultraviolet-Fenton reagent realizes the pretreatment of the plasticizer wastewater, has stable and reliable treatment effect, simple and easy operation and lower operation cost, and is suitable for the pretreatment of high-concentration organic wastewater discharged by organic chemical enterprises and plasticizer production enterprises.
Compared with a single Fenton oxidation method, the method has the following advantages:
the method combines microwave treatment and photochemical synergetic redox reaction technologies, greatly improves the traditional technology for treating wastewater by using the Fenton reagent, effectively reduces the dosage of the Fenton reagent, and ensures that the COD removal rate of the treated wastewater is more than 98 percent.
Detailed Description
The process method for treating plasticizer DINCH wastewater mainly comprises the following steps of treating the wastewater through the following reaction zones:
(1) adding ferrous sulfate and 30% hydrogen peroxide solution into the mixed wastewater, and allowing the mixed wastewater to enter a microwave emission area, wherein the microwave power is 600-800W, the microwave radiation time is 5-10 min, the mass ratio of the hydrogen peroxide solution to the ferrous sulfate is 2-30: 1, and removing COD under the microwave induction action.
(2) The wastewater after microwave radiation enters a reaction zone provided with ultraviolet light catalysis. Under the combined action of ultraviolet irradiation, titanium dioxide hydrate and Fenton oxidant, hydroxyl free radicals are generated, and organic matters which are difficult to degrade in the wastewater are further decomposed and mineralized, wherein the ultraviolet dose is 1000 mJoule per square centimeter.
Comparative example 1
A method for treating plasticizer DINCH wastewater comprises the following steps:
(1) the COD content of the DINCH mixed wastewater as a plasticizer is 47200mg/L, and dilute sulfuric acid solution is added into the wastewater which is continuously stirred to adjust the initial pH value of the wastewater to 3.
(2) Adding ferrous sulfate and a hydrogen peroxide solution (30%) into the wastewater, wherein the mass ratio of the hydrogen peroxide solution to the ferrous sulfate is 14:1, and the dosage of a Fenton reagent is 1.5 ml/m3。
The retention time of the wastewater in the reactor from the beginning to the end of the reaction in the reaction zone is about 3 h, the COD content of the effluent is 36500, and the removal rate of COD is 22.7%.
Example 1
A method for treating plasticizer DINCH wastewater comprises the following steps:
(3) the COD content of the DINCH mixed wastewater as a plasticizer is 47200mg/L, and dilute sulfuric acid solution is added into the wastewater which is continuously stirred to adjust the initial pH value of the wastewater to 3.
(4) Putting the wastewater into a microwave process area, adding ferrous sulfate and hydrogen peroxide solution into the wastewater under the conditions of microwave power of 600W and microwave radiation time of 5 min, adjusting the pH value of the wastewater to 7, and decomposing and mineralizing refractory organic matters in the wastewater, wherein the mass ratio of the hydrogen peroxide solution to the ferrous sulfate is 14:1, and the dosage of a Fenton reagent is 1.5 ml/m3。
(5) After microwave radiation, the wastewater enters an ultraviolet light catalytic reaction zone, and hydroxyl radicals are generated in the reaction zone by utilizing the combined action of ultraviolet radiation, a catalyst and an oxidant, so that organic matters which are difficult to degrade in the wastewater are further decomposed and mineralized. The uv dose was 1000 millijoules per square centimeter.
The retention time of the wastewater in the reactor from the beginning to the end of the reaction in the reaction zone is about 3 h, the COD content of the effluent is 750, and the removal rate of COD is 98.41%.
Example 2
A method for treating plasticizer DINCH wastewater comprises the following steps:
(1) the COD content of the DINCH mixed wastewater as a plasticizer is 47200mg/L, and dilute sulfuric acid solution is added into the wastewater which is continuously stirred to adjust the initial pH value of the wastewater to 3.
(2) The wastewater enters a microwave process area, and sulfuric acid is added into the wastewater under the conditions of microwave power of 600W and microwave radiation time of 10 minAdjusting the pH value of the wastewater to 8 by ferrous and hydrogen peroxide solution, and decomposing and mineralizing organic matters which are difficult to degrade in the wastewater, wherein the mass ratio of the hydrogen peroxide to the ferrous sulfate is 2:1, and the dosage of a Fenton reagent is 1.0 ml/m3。
(3) After microwave radiation, the wastewater enters an ultraviolet light catalytic reaction zone, and hydroxyl radicals are generated in the reaction zone by utilizing the combined action of ultraviolet radiation, a catalyst and an oxidant, so that organic matters which are difficult to degrade in the wastewater are further decomposed and mineralized. The uv dose was 1000 millijoules per square centimeter.
The retention time of the wastewater in the reactor from the beginning to the end of the reaction in the reaction zone of the embodiment is about 2.5 h, the COD content of the effluent is 820, and the removal rate of COD is 98.26%.
Example 3
A method for treating plasticizer DINCH wastewater comprises the following steps:
(1) the COD content of the DINCH mixed wastewater as a plasticizer is 47200mg/L, and dilute sulfuric acid solution is added into the wastewater which is continuously stirred to adjust the initial pH value of the wastewater to 3.
(2) Putting the wastewater into a microwave process area, adding ferrous sulfate and hydrogen peroxide solution (30%) into the wastewater under the conditions of microwave power of 800W and microwave radiation time of 5 min, adjusting the pH value of the wastewater to 7, and decomposing and mineralizing refractory organic matters in the wastewater, wherein the mass ratio of the hydrogen peroxide to the ferrous sulfate is 7:1, and the dosage of a Fenton reagent is 3 ml/m3。
(3) After microwave radiation, the wastewater enters an ultraviolet light catalytic reaction zone, and hydroxyl radicals are generated in the reaction zone by utilizing the combined action of ultraviolet radiation, a catalyst and an oxidant, so that organic matters which are difficult to degrade in the wastewater are further decomposed and mineralized. The uv dose was 1000 millijoules per square centimeter.
The waste water of the embodiment enters the reaction zone from the beginning to the end of the reaction, the retention time in the reactor is about 3 h, the COD content of the effluent is 460, and the removal rate of the COD is 99.03%.
Example 4
A method for treating plasticizer DINCH wastewater comprises the following steps:
(1) the COD content of the DINCH mixed wastewater as a plasticizer is 47200mg/L, and dilute sulfuric acid solution is added into the wastewater which is continuously stirred to adjust the initial pH value of the wastewater to 3.
(2) Putting the wastewater into a microwave process area, adding ferrous sulfate and hydrogen peroxide solution (30%) into the wastewater under the conditions of microwave power of 700W and microwave radiation time of 8 min, adjusting the pH value of the wastewater to 7, and decomposing and mineralizing refractory organic matters in the wastewater, wherein the mass ratio of the hydrogen peroxide to the ferrous sulfate is 25:1, and the dosage of a Fenton reagent is 1.5 ml/m3。
(3) After microwave radiation, the wastewater enters an ultraviolet light catalytic reaction zone, and hydroxyl radicals are generated in the reaction zone by utilizing the combined action of ultraviolet radiation, a catalyst and an oxidant, so that organic matters which are difficult to degrade in the wastewater are further decomposed and mineralized. The uv dose was 1000 millijoules per square centimeter.
The waste water of the embodiment enters the reaction zone from the beginning to the end of the reaction, the retention time in the reactor is about 2 hours, the COD content of the effluent is 840, and the removal rate of COD is 98.22%.
The scope of protection of the invention is not limited to the embodiments described above, but is within the scope of protection of all variants that can be derived by a person skilled in the art, as mentioned in the claims.
Claims (4)
1. A plasticizer DINCH wastewater pretreatment method is characterized by comprising the following steps: (1) adding dilute sulfuric acid into the wastewater generated in the neutralization process of a plasticizer DINCH, and adjusting the initial pH value of the wastewater to 3; (2) adding a Fenton reagent into the wastewater under the microwave induction effect, adjusting the pH value of the wastewater to 7-8, decomposing and mineralizing organic matters difficult to degrade in the wastewater, generating hydroxyl free radicals under the combined action of ultraviolet irradiation, titanium dioxide hydrate and a Fenton oxidant, and further decomposing and mineralizing the organic matters difficult to degrade in the wastewater, wherein the ultraviolet dose is more than 1000 mJ per square centimeter;
in the step (2), the microwave power is 600-800W, and the microwave radiation time is 5-10 min.
2. The method for pretreating wastewater containing plasticizer DINCH according to claim 1, wherein the amount of Fenton's reagent used in step (2) is in the range of 1.0 to 10 mL/m3The retention time is 1-4 h.
3. The method of pretreating wastewater containing plasticizer DINCH according to claim 1, wherein in the step (2), the fenton's reagent oxidant is 30% by weight of hydrogen peroxide solution, and the catalyst is ferrous sulfate.
4. The method for pretreating wastewater of DINCH as a plasticizer according to claim 3, wherein the mass ratio of the hydrogen peroxide solution to the ferrous sulfate in the Fenton's reagent is 2-30: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610409130.XA CN107487911B (en) | 2016-06-13 | 2016-06-13 | Plasticizer DINCH wastewater pretreatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610409130.XA CN107487911B (en) | 2016-06-13 | 2016-06-13 | Plasticizer DINCH wastewater pretreatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107487911A CN107487911A (en) | 2017-12-19 |
| CN107487911B true CN107487911B (en) | 2021-04-06 |
Family
ID=60641872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610409130.XA Active CN107487911B (en) | 2016-06-13 | 2016-06-13 | Plasticizer DINCH wastewater pretreatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107487911B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108483770A (en) * | 2018-05-30 | 2018-09-04 | 常州市兰诺光电科技有限公司 | A kind of photodissociation wastewater treatment equipment |
| CN115178266B (en) * | 2022-07-13 | 2024-08-09 | 广西钢铁集团有限公司 | Method for preparing catalyst for treating sulfur cyanide wastewater and sulfur cyanide wastewater treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101254987A (en) * | 2007-04-13 | 2008-09-03 | 东莞市英硫净水服务有限公司 | Handling method for advanced purification of little-volume refractory wastewater and operation equipment |
| CN101786756A (en) * | 2010-02-09 | 2010-07-28 | 广西博世科环保科技有限公司 | Process method for treating hardly-biodegradable organic wastewater |
| CN102001780A (en) * | 2010-11-29 | 2011-04-06 | 沈阳工业大学 | Method for pre-treating high-concentration organic waste water |
| CN102603103A (en) * | 2012-04-10 | 2012-07-25 | 东莞市珠江海咸水淡化研究所 | Complex heavy-metal waste water emergency quick treatment method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354213C (en) * | 2005-10-27 | 2007-12-12 | 武汉科技学院 | Microwave plasma fortified internal electrolysis photocatelysis oxidation integrated water treatment equipment |
| US7935259B2 (en) * | 2008-07-03 | 2011-05-03 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Filtering apparatus and method of use |
| CN102489332A (en) * | 2011-12-08 | 2012-06-13 | 贵州省复合改性聚合物材料工程技术研究中心 | Polyvinyl chloride (PVC) paste with photocatalysis effect and preparation method thereof |
| CN203530067U (en) * | 2013-11-11 | 2014-04-09 | 陕西理工学院 | Advanced tannery wastewater treatment device |
| CN106242136B (en) * | 2016-08-31 | 2019-06-11 | 浙江奇彩环境科技股份有限公司 | A kind of processing method of the waste water containing pyridines |
-
2016
- 2016-06-13 CN CN201610409130.XA patent/CN107487911B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101254987A (en) * | 2007-04-13 | 2008-09-03 | 东莞市英硫净水服务有限公司 | Handling method for advanced purification of little-volume refractory wastewater and operation equipment |
| CN101786756A (en) * | 2010-02-09 | 2010-07-28 | 广西博世科环保科技有限公司 | Process method for treating hardly-biodegradable organic wastewater |
| CN102001780A (en) * | 2010-11-29 | 2011-04-06 | 沈阳工业大学 | Method for pre-treating high-concentration organic waste water |
| CN102603103A (en) * | 2012-04-10 | 2012-07-25 | 东莞市珠江海咸水淡化研究所 | Complex heavy-metal waste water emergency quick treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107487911A (en) | 2017-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Advanced oxidation process based on hydroxyl and sulfate radicals to degrade refractory organic pollutants in landfill leachate | |
| Pacheco-Álvarez et al. | A critical review on paracetamol removal from different aqueous matrices by Fenton and Fenton-based processes, and their combined methods | |
| Méndez et al. | Detoxification of waters contaminated with phenol, formaldehyde and phenol–formaldehyde mixtures using a combination of biological treatments and advanced oxidation techniques | |
| CN106422152B (en) | Method for removing oxytetracycline in biological medicine waste residues | |
| US10662095B2 (en) | Ozone-photocatalysis reactor and water treatment method | |
| CN102633349B (en) | Method for treating track non-degradable organisms in water by aid of heterogenous sulfate radical oxidation | |
| CN111606406A (en) | Application of natural iron-based mineral in treatment of organic wastewater | |
| Rey et al. | Improved mineralization by combined advanced oxidation processes | |
| Koutahzadeh et al. | Removal of acid black 1 from water by the pulsed corona discharge advanced oxidation method | |
| CN110152671B (en) | Composite metal oxide diatomite catalyst and preparation method and application thereof | |
| CN105800768B (en) | A method of promote ozone quickly to generate hydroxyl radical free radical | |
| CN110255695B (en) | Non-metal catalyzed organic Fenton reaction reagent and application thereof | |
| CN104692569A (en) | Method for degrading waste alkaline residues through ozone-light wave catalytic oxidation | |
| CN107487911B (en) | Plasticizer DINCH wastewater pretreatment method | |
| CN112573624A (en) | High-salinity wastewater composite catalytic oxidation treatment system | |
| Malakootian et al. | Removal of tetracycline from aqueous solution by ultrasound and ultraviolet enhanced persulfate oxidation | |
| Farzinfar et al. | Synergistic degradation of aqueous p-nitrophenol using DBD plasma combined with ZnO photocatalyst | |
| CN106673171A (en) | Method for promoting peroxymonosulfate to generate sulfate radicals for degrading organic matters | |
| CN103496811A (en) | Method for deeply treating and recycling coal gasification wastewater by preposed oxidization combined with microwaves | |
| CN115779906B (en) | Method for catalyzing peracetic acid to degrade endocrine disruptors in water by using modified multiwall carbon nanotubes | |
| CN103482718A (en) | Method for degrading dienestrol in water body through electron beam irradiation | |
| US20110084231A1 (en) | Method and process of producing short chain fatty acids from waste stream containing phenolic lignin model compounds by controlled photocatalytic oxidation with titanium dioxide nanocatalyst in the presence of ultraviolet radiation | |
| CN104609617A (en) | Method and apparatus for removing organic matters from high-hydrochloric-acid-content wastewater | |
| Zhong et al. | Identifying oxidation intermediates formed during ozone–UV of fulvic acid | |
| CN112624300B (en) | Method for treating wastewater from production of propylene oxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |